Primary Color Correction: Tonal Correction Tools - The Art and Technique of Digital Color Correction - page 59

be able to bring back any detail into the blown-out sky, but you may be
able to create some texture in the areas where the clipped sky rolls off or
transitions to another element, like the edges of the trees.
The thing you want to avoid when you use two points on a curve
that are fairly close to each other, is “posterizing.”
Try placing a point on the Master Graph less than a quarter of the
way from the top. Then pull that point down a little while you watch
the areas that transition from the clipped sky. The thing you want to
avoid when you use two points on a curve that are fairly close to each
other, is “posterizing.” (See definition for posterization at the top of this
chapter.) If you adjust the point too radically, it will posterize. As much
as you may want to eliminate the clipping in the sky, having posteriza-
tion is much worse. If you find a good balance before the posterizing
occurs, you may be able to create some texture in the areas surrounding
the clipped sky. I was able to bring it down by only a very little bit. You
can also watch the top of the waveform while doing this and you will see
the compressed, clipped area at the top of the waveform start to stretch
out ( Figure 2.29 ) . Don't get “target lock” while doing this. You'll be
Fig. 2.29 Final Curves adjustment in Color Finesse.